Techniques for aligning frame data

摘要

Techniques are described that can used to synchronize the start of frames from multiple sources so that when a display is to output a frame to a next source, boundaries of current and next source are aligned. Techniques are useful to avoid visual distortions when changing from a first video source to a second video source.

主权项

1. A computer-implemented method comprising:
receiving, by said computer, at least one frame from a first frame source, wherein an interval between two frames from the first frame source comprises a first vertical blanking interval; reading at least one frame from a second frame source, wherein an interval between two frames from the second frame source comprises a second vertical blanking interval; providing a frame from the second frame source for display; determining whether commencements of the first vertical blanking interval and the second vertical blanking interval occur with a predefined time region, wherein the predefined time region is set to achieve a minimum vertical blank specification of the display not being violated for a frame from the second frame source and at least (1) a maximum vertical blank specification of the display not being violated for a frame from the second frame source and (2) read of a frame from the second frame source has not commenced; and selectively providing a next frame from the first frame source for display after the determination that the commencements of the first vertical blanking interval and the second vertical blanking interval occurred with the predefined time region.